# US 2023/0147209 A1 · Drill head and method for producing a vertical borehole in the ground > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0147209 A1 - Document ID: US20230147209A1 - Status: Published application - Kind: A1 - Application number: 17/628,852 - Filed: 2020-07-21 - Published: 2023-05-11 - Earliest claimed: 2020-07-21 - Assignees: Herrenknecht AG - Applicants: Herrenknecht AG - Inventors: Patrick RENNKAMP - Web page: https://patentgrep.com/patent/US20230147209A1 ## CPC - E21B 10/602: {the bit being a rotary drag type bit with blades} - E21B 21/12: using drilling pipes with plural fluid passages, e.g. closed circulation systems - E21D 9/11: with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines - E21D 1/06: with shaft-boring cutters (drilling machines E21B, E21C) - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - E21D: SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil-conditioning or soil-stabilising materials C09K17/00; drilling or cutting machines for mining or quarrying E21C; safety devices, transport, rescue, ventilation or drainage E21F) ## Abstract The invention relates to a drill head and to a method for producing a substantially vertical borehole in the ground, in particular for producing a shaft, having a body (11) which is able to be connected to a rotary drive of a drilling device, having drilling tools (12) which for loosening the ground at a face (100) of the borehole are disposed on the body (11), having a discharge device which for discharging the loosened ground on the face (100) is able to be connected to a suction unit for suctioning a conveying medium (90) by way of a conveying line (31), wherein the discharge device has an opening region (22) which is disposed on the body (11) and has at least one opening (23) in the region of the drilling tools (12) at the face. It is provided here that the at least one opening (23) of the opening region (22) is connected to a suction box (20) which as a component part of the discharge device has, at an end opposite the opening (23), a connector opening (29) for connecting to the conveying line (31), that at least one element which exerts an acceleration on the loosened ground in the region of the suction box (20) is provided, by way of which acceleration the ground loosened by the drilling tools (12) is able to be moved into the opening region (22) and/or through the opening (23) into the suction box (25), wherein the loosened ground (110) is acquired by the conveying medium (90) in the opening (23) and/or in the suction box (25) and is able to be discharged by way of the conveying line (31) by the suction unit. ## Claims ### Claim at position 1 1-27. (canceled) ### Claim 28 A drill head for producing a vertical borehole in the ground comprising: a body connectable to a rotary drive of a drilling device, drilling tools disposed on the body for loosening the ground at a face of the borehole; a discharge device connectable to a suction unit of the drilling device configured to discharge the loosened ground on the face wherein the suction unit is configured to suction a conveying medium via a conveying line of the drilling device, wherein the discharge device comprises an opening region disposed on the body; the opening region having at least one opening in the region of the drilling tools at the face; a suction box disposed in the discharge device connected to the at least one opening, the suction box comprising at an end opposite the opening and a connector opening connectable to the suction line; at least one acceleration element exerting an acceleration on the loosened ground to move the ground loosened by the drilling tools one of into the opening region or through the opening into the suction box; wherein the loosened ground is picked up by the conveying medium one of in the opening region or in the suction box and is discharged via the conveying line by the suction unit; wherein a spacing of the opening region in relation to the face is adjustable; and wherein the adjustment of the spacing is provided one of by vertically moving the suction box with an actuator or by pivoting the suction box about a pivot point with an actuator. ### Claim 29 (depends on 28) The drill head as claimed in claim 28, wherein the at least one acceleration element comprises at least one nozzle directed into the opening region dispensing at least one jet of a transport medium. ### Claim 30 (depends on 28) The drill head as claimed in claim 28, wherein at least one flushing nozzle is configured for transporting ground loosened to a region on the face traversed by the suction box as the drill head rotates. ### Claim 31 (depends on 28) The drill head as claimed in claim 28, wherein the suction box comprises at least one nozzle in its interior space. ### Claim 32 (depends on 28) The drill head as claimed in claim 28, wherein one of the conveying medium or the transport medium is one of a liquid or gaseous medium. ### Claim 33 (depends on 28) The drill head as claimed in claim 28, wherein the at least one acceleration element is at least one driven rotary element comprising at least one impact element, wherein the at least one impact element is rotated. ### Claim 34 (depends on 33) The drill head as claimed in claim 33, wherein the impact element is rotated on an impact circle concentric about the rotary element. ### Claim 35 (depends on 33) The drill head as claimed in claim 33, wherein the at least one impact element is movably disposed on the at least one rotary element. ### Claim 36 (depends on 33) The drill head as claimed in claim 33, wherein the at least one impact element comprises at least one of a hammer, a blade, a cable, a chain, a brush element, or a chisel. ### Claim 37 (depends on 33) The drill head as claimed in claim 33, wherein the rotation speed of the at least one rotary element is controllable. ### Claim 38 (depends on 28) The drill head as claimed in claim 28, wherein the suction box is disposed one in horizontal, inclined or vertical orientation. ### Claim 39 (depends on 28) The drill head as claimed in claim 28, wherein at least one tool for one of loosening ground or picking up loosened ground is provided in the opening region. ### Claim 40 (depends on 39) The drill head as claimed in claim 39, wherein the at least one tool is moveable to change the spacing between the tool and the face. ### Claim 41 (depends on 39) The drill head as claimed in claim 39, wherein the at least one tool is pivotable in relation to the opening region. ### Claim 42 (depends on 28) The drill head as claimed in claim 28, wherein at least one deflection region for changing the direction of the flow of loosened ground is provided between the opening and the suction box. ### Claim 43 (depends on 28) The drill head as claimed in claim 28, wherein the opening region has an elongate extent. ### Claim 44 (depends on 32) The drill head as claimed in claim 32, wherein the liquid is one of water or a bentonite suspension. ### Claim 45 (depends on 32) The drill head as claimed in claim 32, wherein the gaseous medium is air. ### Claim 46 (depends on 39) The drill head as claimed in claim 39, wherein the at least one tool is a toothed bar.